Kwinda David Lesson About Mathematics and Physics and Chemistry.

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Who can try to give answers in number 1 and 2

Group II alkaline earth metals. Be, Mg, Ca...
Lets start with Be elements.
What is Be? How is extracted? Where it can be used.?

Calculate this simple question?

Anyone who need help from those three subjects, you are welcomed and feel free to post a question. And you will get what need.

Answer the following simple question

Chemistry:
1. The most electronegative element among the following is
A. sodium B. bromine
C. fluorine D. oxygen

2. The metallurgical process in which a metal is obtained in a fused state is called
A. smelting B. roasting
C. calcinations D. froth floatation

Physics: It is easier to roll a stone up a sloping road than to lift it vertical upwards because
A. work done in rolling is more than in lifting
B. work done in lifting the stone is equal to rolling it
C. work done in both is same but the rate of doing work is less in rolling
D. work done in rolling a stone is less than in lifting it